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Compare two DataFrames and output their differences side-by-side
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Why is 1/1/1970 the “epoch time”?
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Early versions of unix measured system time in 1/60 s intervals. This meant that a 32-bit unsigned integer could only represent a span of time less than 829 days. For this reason, the time represented by the number 0 (called the epoch) had to be set in the very recent pas...
How to use a decimal range() step value?
Is there a way to step between 0 and 1 by 0.1?
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What is the formal difference in Scala between braces and parentheses, and when should they be used?
... if, and only if, the method expects a single parameter. For example:
List(1, 2, 3).reduceLeft{_ + _} // valid, single Function2[Int,Int] parameter
List{1, 2, 3}.reduceLeft(_ + _) // invalid, A* vararg parameter
However, there’s more you need to know to better grasp these rules.
Increased compil...
Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
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Efficient SQL test query or validation query that will work across all (or most) databases
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Waiting until two async blocks are executed before starting another block
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pandas: filter rows of DataFrame with operator chaining
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How does the C code that prints from 1 to 1000 without loops or conditional statements work?
I've found C code that prints from 1 to 1000 without loops or conditionals :
But I don't understand how it works. Can anyone go through the code and explain each line?
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List of All Locales and Their Short Codes?
...know about them when you write your application. My Windows 7 system has 211 locales installed (listed below), so you wouldn't likely write any custom code or translation specific to this many locales.
The most important thing for various versions of English is in formatting numbers and dates. Ot...